Help Me Please I Really Need To Pass

Question

A ladder, which is 10 feet long, is placed on a wall such that the top of the ladder touches the top of the wall. The bottom of the ladder is 6 feet away from the wall. What is the height of the wall?

Answer 1

height of the wall squared = 10^2 -6^2 = 100-36 =64

height = sqr64 = 8 feet

the wall, 6 feet and ladder from a right triangle

where the hypotenuse squared = sum of squares of the height and bas

10^2 = 6^2 + 8^2

100 =36+64